Search found 1384 matches
- Mon Oct 17, 2022 10:59 am America/New_York
- Forum: Questions/Comments
- Question: R2022 processing
- Replies: 3
Re: R2022 processing
Mati, I'm assuming you're not finding the data on the L1/2 browser...the reason is complicated, but boils down to the fact that the L1 filenames were forced to have a start time that matched the start time for the GAC file of the orbit containing the LAC data. With our new naming convention, we're e...
- Wed Oct 12, 2022 12:57 pm America/New_York
- Forum: Questions/Comments
- Question: I want to convert kd490 unit
- Replies: 5
Re: I want to convert kd490 unit
Well, Kd490 is not a measure of turbidity, it's a measure of diffuse attenuation. Turbidity is effectively a measure of scattering. While scattering is part of attenuation, it is not everything, as attenuation also includes absorption. So there is a relationship between turbidity and Kd490, but it i...
- Tue Oct 11, 2022 1:34 pm America/New_York
- Forum: Questions/Comments
- Question: An error when processing viirs Ibands with Seadas
- Replies: 8
Re: VIIRS-JPSS1 l2gen failure after R2022.14 tag instalation
Josep, Seems we missed a required modification to the LutUtils.py code. For the previous reprocessing, JPSS1_VIIRS did not require an xcal file, so LutUtils.py didn't look for them to pull down. Until we can get the change into a tag, you can make the following change to $OCSSW_BIN/seadasutils/LutUt...
- Fri Oct 07, 2022 1:19 pm America/New_York
- Forum: Questions/Comments
- Question: An error when processing viirs Ibands with Seadas
- Replies: 8
Re: An error when processing viirs Ibands with Seadas
NOAA provides a surface reflectance product that includes the I-bands: https://www.ospo.noaa.gov/Products/land/sr/
- Thu Oct 06, 2022 10:43 am America/New_York
- Forum: Questions/Comments
- Question: OB DAAC data on AWS
- Replies: 2
Re: OB DAAC data on AWS
Not yet. We are working on it, but I cannot give a date. Well, I could, but it very likely wouldn't be a realistic one
OK...here's one: Dec 2023.
It is my *hope* to have some of our data available in the Earthdata Cloud by the end of 2023...but no promises.
Sean

OK...here's one: Dec 2023.
It is my *hope* to have some of our data available in the Earthdata Cloud by the end of 2023...but no promises.
Sean
- Wed Oct 05, 2022 2:17 pm America/New_York
- Forum: Questions/Comments
- Question: Question related to Chl-a Algorithm
- Replies: 2
Re: Question related to Chl-a Algorithm
Quite the loaded question ;) The Southern Ocean is big and most of it is quite far from civilization. This makes obtaining in situ validation data a challenge to say the least. As a result, the spatial and temporal sampling is rather skewed and probably not applicable to the entire Southern Ocean. T...
- Wed Oct 05, 2022 8:42 am America/New_York
- Forum: Questions/Comments
- Question: l2_flags
- Replies: 2
Re: l2_flags
That flag will become "OPSHAL" (optically shallow water). It is not fully validated yet, so it's still "hidden" as SPARE23...apparently not well hidden
Sean

Sean
- Mon Oct 03, 2022 1:20 pm America/New_York
- Forum: Questions/Comments
- Question: Nomenclature of VIIRS L2 differs by 1 sec from L1A and GEO
- Replies: 1
Re: Nomenclature of VIIRS L2 differs by 1 sec from L1A and GEO
This is not unexpected. The same issue exists with the MODIS filenames. Both MODIS and VIIRS L1 files are "chopped" into 5 (or 6) minute granules, but the scan rate for the sensors does not fall exactly on the 5 (or 6) minute boundaries. The L2 filenames are derived from the actual time of...
- Fri Sep 30, 2022 4:16 pm America/New_York
- Forum: Questions/Comments
- Question: Question about OceanColor solar irradiance (F0) and nLw units
- Replies: 5
Re: Question about OceanColor solar irradiance (F0) and nLw units
The Rrs values are typically reported as 10nm wide square band values. The F0 values on the rsr_tables page are fully convolved with the sensor spectral response function. This is not the nominal 10nm square band value. So, the value in the metadata of the L2 file in question is the one to use, as i...
- Fri Sep 30, 2022 4:12 pm America/New_York
- Forum: Questions/Comments
- Question: SeaDAS version and R2022
- Replies: 7
Re: SeaDAS version and R2022
You can get the old LUTs back (see my response here: https://forum.earthdata.nasa.gov/viewtopic.php?p=12674#p12674), but if you want to update, go with R2022.14. The 'R' series is the new 'V', and once we get through ALL the missions we're reprocessing, a new 'V' tag will be defined (which will be e...